Java获取服务器Ip

        Enumeration allNetInterfaces = null;
        try {
            allNetInterfaces = NetworkInterface.getNetworkInterfaces();
        } catch (SocketException e) {
            LOG.error("get local ip failed.", e);
            throw new SocketException("get local ip failed. SocketException");
        }

这样获取到的是包含ipv4和v6的所有网络接口的信息。

因此还需要对这些查到的ip做过滤。

        List localIpList = new ArrayList();
        if (allNetInterfaces != null) {
            while (allNetInterfaces.hasMoreElements()) {
                NetworkInterface netInterface = allNetInterfaces.nextElement();
                Enumeration addresses = netInterface.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    InetAddress ip = addresses.nextElement();
                    if (ip instanceof Inet4Address) {
                        localIpList.add(ip.getHostAddress());
                    }
                }
            }
        }
        return localIpList;

这样拿到的是ipv4的ip地址了，但也会包含127.0.0.1

因此还要再做一次过滤

        if (CollectionUtils.isNotEmpty(localIpList)) {
            for (String localIp : localIpList) {
                if (StringUtils.isNotBlank(localIp) && !localIp.startsWith(RESERVED_IP_PREFIX)) {
                    return localIp;
                }
            }
        }

        return LOCAL_IP_DEFAULT;